Two-dimensional $O_2$ and OH Density Measurement Using Tunable KrF Excimer Laser Light a Combustion Bomb via Planar Laser Induced Predissociative Fluorescence and Laser Rayleigh Scattering

평면 선해리 레이저유도 형광법과 레이래이 분산법을 이용한 연소실내의 OH 및 $O_2$의 2차원적 농도측정

Tunable KrF Excimer Laser is used here for measuring OH and $O_2$ density distribustion in an open $H_2$/air premixed flame and in a combustion bomb. Laser Rayleigh Scattering(LRS) and Planar Laser Induced Predissociative Fluorescence(PLIPF) methods are used to obtain two-dimensional images of total and specific densities. Laser Excitation wavelengths are calibrated via flame images and combustion bomb images show good qualitative a greement with theoretical calculation. Furthermore images in a combustion bomb can be developed to study real Spark-Ignition engine combustions. Our experimental images show that there are no more collisional quenching problem at high pressure environment(including atmospheric pressure) using predissociative fluorescence technique. Further development to obtain two-dimensional temperature dustribution is ready to use eventhough it is not reported in this paper.